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41 lines
1.9 KiB
41 lines
1.9 KiB
;=========== RAM Disk Parameter Block =============************************
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; - D-X Designs Pty Ltd P112 - ** Hardware Dependent **
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; ************************
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; 1.1 - 28 Aug 01 - Cleaned up for GPL release. HFB
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; 1.0 - 10 Jun 96 - Initial Release for P112 derived from YASBEC. HFB
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;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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; The B/P BIOS DPB's contain prefix information that provide data on the
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; logical format. This table contains only DPB Data on a RAM Disk.
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; Format Type Bytes 0 and 1 are configured in the same way as Hard Disks.
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; See DPBHD-xx.LIB and DPB.LIB files for descriptions of these two bytes.
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; NOTE: No Skew Table needed since RAM Disk Format is locked and not needed
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;.....
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; P112 RAM Disk Format assuming 32k for a single System bank
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DEFB 'D-X Desig','n'+80H ; Id - 10 bytes
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DEFB FIXDSK ; Format type byte 0
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DEFB SPEED8+SEC128+ALC2K ; Format type byte 1
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DEFB -1 ; Skew factor (== Only the +/- sign used)
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DEFB 0 ; Starting sector number
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DEFB 32 ; Physical # sectors/trk (32=4k per 'track')
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DEFB 0 ; Physical tracks/side (No Meaning in HD)
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MSIZ EQU 176 ; # of blocks in Drive (by Memory/Block size)
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; 2x128k = 80 (160k) - 64 (128k) w/User Bank
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; 1x512k = 192 (384k) - 176 (352k) w/User Bank
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; 2x512k = 448 (896k) - 432 (864k) w/User Bank
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DPBRAM: DEFW 32 ; Sectors/Track
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DEFB 4 ; Block Shift Factor (2k per block)
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DEFB 0FH ; Block Mask
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DEFB 0 ; Extent Mask
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DEFW MSIZ-1 ; Disk Size-1 256 kB 512 kB 1024 kB
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DEFW 128 ; Dir Max -or- 64 128 256
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DEFB 0C0H, 00 ; Alloc 0, 1 80H,0 0C0H,0 0F0H,0
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DEFW 0000 ; Check Size
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DEFW 0000 ; Trk Offset from beginning of Ram Bank base
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;==================== End of RAM Disk DPB ====================
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